Locking loop catheter

Patent metadata

Field	Value
Publication number	US-2016199625-A1
Application number	US-201614988866-A
Country	US
Kind code	A1
Filing date	Jan 6, 2016
Priority date	Jan 13, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

A drainage catheter system includes an elongate tube with proximal and distal ends and a filament extending the tube that is adjustable to create a closed loop at the distal end of the tube when the filament is retracted relative to the tube. The filament is coupled to the tube such that the filament and tube are prevented from being separated in the event that the tube and filament are cut at the proximal end at the conclusion of a drainage procedure. The filament can be attached to the tube near the distal end. The filament can be attached to the tube along its length. The catheter system can also include a retraction mechanism having a first fixed position and second fixed position, where the second fixed position retracts the filament proximally relative to the first fixed position by actuating a plunger.

First claim

1 . A catheter having a proximal end and a distal end comprising:
an elongate tube having a proximal end and a distal end and defining at least one lumen extending therebetween; an exit port defined by the tube and extending through the tube adjacent the distal end of the tube; an entry port extending through the tube and creating fluid communication between an exterior of the tube and the at least one lumen of the tube; a filament extending within the elongate tube and extending out of the exit port such that a portion of the filament is exposed to the exterior of the tube and further extending into the entry port; wherein the filament includes a free end disposed at the proximal end, the free end being adjustable proximally and distally, wherein proximal retraction of the filament puts the filament in tension and creates a looped end portion of the tube where the exit port and entry port are urged toward each other, and releasing the filament from its proximal retraction allows the tube to return to a non-looped shape and the exit and entry ports to move away from each other; wherein the filament is coupled to the tube to prevent the filament and tube from being separated in response to retraction of the tube.

2 . The catheter of claim 1 , wherein the filament includes a distal secured end that is coupled to the tube at the entry port.

3 . The catheter of claim 2 , wherein the free end is disposed at an opposite end of the filament from the distal secured end.

4 . The catheter of claim 2 , wherein the distal secured end is disposed within the lumen of the catheter.

5 . The catheter of claim 4 , wherein the distal secured end includes a head portion having a width that is larger than a width of the entry port.

6 . The catheter of claim 5 , wherein the head portion is a knot.

7 . The catheter of claim 5 , wherein the head portion is in the form of a T-tip.

8 . The catheter of claim 4 , wherein the distal secured end is bonded to the tube.

9 . The catheter of claim 1 , wherein the filament includes a secured length portion that is secured to the tube along a length of the tube.

10 . The catheter of claim 9 , wherein the secured length portion is embedded in a sidewall of the tube.

11 . The catheter of claim 9 , wherein the secured length portion is disposed within the at least one lumen, and the secured length portion is bonded to an inner surface of the tube.

12 . The catheter of claim 2 , wherein the at least one lumen comprises a drainage lumen and a filament lumen, and the filament extends through the filament lumen and exits the filament lumen at the exit port.

13 . The catheter of claim 9 , wherein the filament includes an adjustable portion that extends proximally from the entry port through the at least one lumen.

14 . A catheter system comprising:
an elongate tube having a proximal end and a distal end and defining at least one lumen extending therebetween; an exit port defined by the tube and extending through the tube adjacent the distal end of the tube; an entry port extending through the tube and creating fluid communication between an exterior of the tube and the at least one lumen of the tube; a filament extending within the elongate tube and extending out of the exit port such that a portion of the filament is exposed to the exterior of the tube and further extending into the entry port and proximally through the tube; wherein the filament includes a fixed proximal end and an adjustable free end disposed at an end opposite the fixed proximal end, the free end being adjustable proximally and distally, wherein proximal retraction of the free end puts the filament in tension and creates a looped end portion of the tube where the exit port and entry port are urged toward each other, and releasing the filament from its proximal retraction allows the tube to return to a non-looped shape and the exit and entry ports to move away from each other; wherein the free end of the filament is fixedly coupled to a retraction mechanism, the retraction mechanism moveable between a first fixed position and a second fixed position; wherein the second fixed position places the filament in tension and is disposed proximally relative to the first fixed position.

15 . The system of claim 14 , wherein the retraction mechanism includes a spring that is compressed in the first position relative to the second position, and the spring biases the retraction mechanism toward the second position when compressed.

16 . The system of claim 15 , wherein the retraction mechanism includes a distal cam and a proximal cam, the distal cam coupled to the free end of the filament and the spring, and the proximal cam is actuatable to move the distal cam between the first and second positions.

17 . The system of claim 16 , wherein the proximal cam includes a depressible plunger coupled thereto.

18 . The system of claim 14 , wherein the system further includes a proximal hub coupled to the tube, and the fixed end is coupled to the hub.

19 . The system of claim 14 , wherein the at least one lumen comprises a filament lumen and a drainage lumen, the filament extending distally from the fixed proximal end through the filament lumen and proximally through the drainage lumen after entering through the entry port.

20 . A catheter system comprising:
an elongate tube having a proximal end and a distal end and defining at least one lumen extending therebetween; an exit port defined by the tube and extending through the tube adjacent the distal end of the tube; an entry port extending through the tube and creating fluid communication between an exterior of the tube and the at least one lumen of the tube; a filament extending within the elongate tube and extending out of the exit port such that a portion of the filament is exposed to the exterior of the tube and further extending into the entry port; wherein the filament includes a free end disposed at the proximal end, the free end being adjustable proximally and distally, wherein proximal retraction of the filament puts the filament in tension and creates a looped end portion of the tube where the exit port and entry port are urged toward each other, and releasing the filament from its proximal retraction allows the tube to return to a non-looped shape and the exit and entry ports to move away from each other; wherein the filament is coupled to the tube to prevent the filament and tube from being separated in response to retraction of the tube; and a retraction mechanism coupled to the free end of the filament for adjusting the filament proximally and distally, the retraction mechanism moveable between a first fixed position and a second fixed position; wherein the second fixed position places the filament in tension and is disposed proximally relative to the first fixed position.

Assignees

• Cook Medical Technologies Llc

Inventors

• Rosenbaum Joanna Lynn
• Lawrence Mydosh Andrea Christine

Classifications

• A61M2025/0163

  Looped catheters · CPC title

• A61M25/04

  in the body, e.g. expansible {(A61M25/10, A61M16/0488 take precedence)} · CPC title

• A61M25/0071

  Multiple separate lumens (multiple separate lumens throughout the catheter A61M25/0026) · CPC title

• A61M27/00 Primary

  Drainage appliance for wounds or the like {, i.e. wound drains, implanted drains} ({negative pressure wound therapy devices A61M1/90;} implements for holding wound open A61B17/02 {; middle ear drainage A61F11/202}) · CPC title

• A61M25/0147 Primary

  with movable mechanical means, e.g. pull wires · CPC title